Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8fb75d757f8fca76d1c2552181a31db072cc79b133a045983b7b6b4c15ebc278' 
  AND token = '7FEM/KUtp3pZusuvbMpL3qpy/yrFw9vY9q1ItsvziiE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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