Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'feff701140412a2d4d49fa751ade386ea38ac4bf6187a170150a66f97c6612fd' 
  AND token = 'k8xUegVQm8vRsBkvL9tPEt/rZMcnhLGd1r8Bb/FRC3s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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