Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ce26bc471da468aca122bc745ac41b1d3106a4298b9bc2aac1314ce5b2028bff' 
  AND token = 'H2w+2G+uAWMOcIPSt3Cy/LCPkHYyxulAP6AmgvSmGNs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}