Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e8700d53726135e767a7f57331de1bd06c879285b00c7b35bf00ff8c84712b3c' 
  AND token = 'gSc9uUsFauIqBLe3IJ0Z51mNJ3VLKWLxKRVAwQ5Y3NI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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