Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b64f709fee09ea743f8da983b637e6e12ac93bc4c7fced9d31e0ec32cac0fba3' 
  AND token = '2yV0skO92GGEVmZIM4rOEqFNlB6EazVAL2AQoOcHPmw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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