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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'fbd6d9242d81822351c5cc59235602f0b90d69472d8db38a63e6995c8a3a4bd5' 
  AND token = 'okMSl6xmMvnBLBb38tiBTswDmybSod25ZpJsQWy6A/0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}