Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b0c761055dc09eb7892d0f732a39ba0acc696eb2829b07733afc1792470dfa36' 
  AND token = 'Qn6qc7TMaa4f9KT3K97u3DDzH3gIigOezgwgEUElXLs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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