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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9ab4650afc500afcbffa743516793020dcbc24148af5d111fba4df0946ba4f3c' 
  AND token = 'c1ooMvQWRhQR9fPo54/WVfDPtzCpZO3/yfRFp+3h+FM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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