Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '872a329accec92bf23ccdca0e47f50f6e0bb23d5239fd525e05e41bd054ad889' 
  AND token = 'iDX3OGNc5sNOaJyj0munJ+lARUYcpbEvI9uDPw6gE0w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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