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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'faeb6f1978a5da0e4a3bc62bd940bf9681353f31d7b84cd9562286c8a955a026' 
  AND token = 'qCqKac6cPgdUepurx9h6AWADX0Kkofy6Q8yJEKIzelY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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