Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '133cc46e00fa8128c0a51d5b466333d7b80b5cc08cf10a7d6ac75913ed24ae73' 
  AND token = 'vvI35yZzCBV6C2Qai2RKd4l6uWFaUlVfMSE3aBh48qM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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