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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '669b4e6bf0cca07c837745c6fd2bcbd124faa70d6768d66a1fb6b0af82db2fc2' 
  AND token = 'jVVSjvPpdDRmB0J6lmTahFgyT+cIkCn9viXcjqQQzG4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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