Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a95179fc3b77afd670a32649288c3b87e18d25716f074b356b94dd99c54438b6' 
  AND token = 'R6fVNST8kJMHfOYD7Uz0Vz8FSkdP7xmUXvov86shKbQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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