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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '07715704372e173a4436c24a71a9ba2f571bde9e67917db4119814b65e41a51d' 
  AND token = 'b9oq98wFmBnNGPJKPDwFOaZkTziSKqel6p9PYvlzz/M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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