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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd04112877a5a76b8f86532252da6e8fa3c8afe16cd55c4e597a037451759586a' 
  AND token = 'NiqDkWj3JaFHWb8DWP3IS/vWIDYXHpdjxb41sKql+a4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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