Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '322cadca4a812a6f423dc6908c0f7d63093403a46b8099bd36029f13ff4db248' 
  AND token = 'DHMexnE2POXuj1syMGrUwXr9AQ8QkDyDM/Ge6XqCyCA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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