Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '845f3b9a9a98f640065dc32f895898fee285de82e72d74dfaeb9db59c6c65847' 
  AND token = 'dzYIKLdQicHFMyIRULX1v/XBktmGLCXALWDybl+Spm4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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