Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5ee89ada18d19362aefecaf1024fbafb17e53f057888610cf9950c7395949a5b' 
  AND token = '7EfdRGhmcCQi1N2mgHt1mbST9XXHEvK6WEwStNLJfJY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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