Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b5b2d85767056f0a20eb2b53746af1145234fb470f7556855c5c0fb0284807b5' 
  AND token = 'NdBkV6KSf6H59pNYmFLU0zA+th7M1+q/kQp0i6EKaH0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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