SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cab4f17960c3a614d718e9fd1e2c70533db4e488705526fd4e345de992e08d99' 
  AND token = 'zWesKlpvqO/YjYAy9mIuJ0C3S62j7Iz9kriH8qVw3J8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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