Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '713443835e510df7d2a81935abcde50f278b56c4290785c68bf131083253863c' 
  AND token = 'Q3GNdjmqqaZdJgpbEdDt8GIInj9bBsGmVkAaYRegtz8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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