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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '00335315c9fed753eb9ac2cbf83d34831d388005961cdfee865f9cdf2c898eeb' 
  AND token = '1FSrfXQmUE8E5bM0ypl6d6v4Df75aoGSabQr2ibX8wE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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