Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f38d1f82af63a25a71b68dc6858d22f6700ac3a7ebfa0771bbd292d7171f3dbe' 
  AND token = 'IojMVI/8xvzGDauW8dfurHqMd4DuIllz1kJIqgxL+IA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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