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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '65e82d4006a5098e5099bcb9dd7e42dac2fdcf443ebefa5db96a4793a01420f7' 
  AND token = 'J1iXzJvHdXDpdyQDiD0YjULKQJUA73l121mkFkWrBTY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00084

JSON explain

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