Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '824bd3139de15d4742dcdebbb2b3ed7bca84835cce9723e3620875097dd39e60' 
  AND token = 'm3jUoYMGVKES1/VJsgqr5e31J05XaZ4rjpYqikeTTGQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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