Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6013853f05d1c1195c5eafab720e93fdc44afbbff218859d812cfc444b943a9c' 
  AND token = '+3mTud9YmkEyzxrGOiQ+U2gem6EiPaoGrDQoF1DHdQk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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