Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a0404646e78a97375ad3b8f77a9ac79b7aca7d9e277cadbb95380c948a73eb7a' 
  AND token = 'RIlTTQwkDIYAzGoD+bV+jxzA2V2o0ZF3BWMqyYQineY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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