Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0742179ea005283df4c8ff7973612d0d8d3089c4a769845cd9f077914c5ab637' 
  AND token = '1yoGhRfcZNfSYJWKCZEdzoKLzLy4XJT1HPQzx09leIY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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