Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'f45743655d2210fb89464798147f8d28a0b96e46b3bad10662ec8f76cacaf473' 
  AND token = 'f8135krNIqlbTagmQvn09AizheBUDCSEtyUWAeS39iM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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