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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ff241fd75c41bcc37088e27f9e77f10281e304bd8aa451707b0e8b5527010333' 
  AND token = 'AUfKIeVHVvBn8ndpqiIWXmdYls3UJwXY9V9IW6q9keI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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