Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4088c0a0e9bdfe4c47af89bc8a40157e61ce67bf7916a9aa4c9e7b4c7655ca45' 
  AND token = '0vKcRND2zuIVSDs9XsPdke6xrDR5IEc5p3s5X6ImKFA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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