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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '2eb4086ab46e1f633ec46f02e9bf7c2b3dfdc35da074930b6ddddc6a518d7e20' 
  AND token = '7bqbg/dk34ao2UDqDQiCAz5tF2pjJGiPhk3e9BiTrRo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00011

JSON explain

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