Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7be6894d4a0d200884cf35fcdff6487b4c48014c161b79674cc5dff50f5c7fe1' 
  AND token = 'qRSjJaM/yT8QL5Ghfmi+lP3oSJsXmW22eulmDd04AGI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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