Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e28287609706cb7d100aa6244068d98027bb337f68400e898db3b22bed01b79f' 
  AND token = 'CUYWay4x73F50arb3ejb3SQiTH2sNjUpV/yuHFZhL9k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}