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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '67f5a36350c40b64d2a55910c2900b8f25fe9da9ba484b1a8269875c18eeea9f' 
  AND token = 'ypBYmj8VYXmzA17mEG0wXWPS1r2cJThhkdQiKA57NYo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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