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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'de18dc8f2625728372edaa3bfe49222d4391b3eb10445aae5655f2e86b129a99' 
  AND token = 'U3J+1HZvSQFsZeQ8VhVWN1tK3l7Lb9gNr+d7hH/IC0U=' 
  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"
    }
  }
}