Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bf68800302fdad62c4a9918b8a2e1dcbef57a9cadb0ec002418178e1a45e02dd' 
  AND token = 'mEsdcGBObWXjYoMb1b4DqJJBec08hqZ/3rrPxXbiVAo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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