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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '06af3676299c3bb0c5a40250f01477fbc8faf3c0c1baa687f30337a09fef888d' 
  AND token = 'JcoG796szaxafaocwfPigkUKChExP2/gAvGps0pMpl0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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