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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f37b8fb575dec3e0ff18a287aafdc410cc6fef4431a126ed886525a13e4cc713' 
  AND token = 'Mf8Wl+JH4vE1g106fkpCjDzJq9leQXslcC3TSLSpEE0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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