Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '41f974fd8fa2673c1c336b9eed27cd7106ee17bd885441cadc5d80797b3daa54' 
  AND token = '3LZfdheaGx9aljMfzm0OxjiKicnbg/LGF6P3TUylAZI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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