Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4d8b5683d41ee9feb03bda51f97e0d2f9d28fad36303565941ba1854d9ea2fde' 
  AND token = 'UBLVulCa+eTI0/3FGa3b/s3LxNCK7oj1nsllcjYoa68=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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