Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c5c535572bac3dda69da62109d844b725cac6a6aefd27fadf0e13c6c16624555' 
  AND token = '+Rzub5R93ZBM7TYZC2F3lL0JjqRvjdye3Egfommn7B4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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