Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '975471f64933e973e8c8d07d972f8a82920c49fe4b47ef4f6771deaff64a2760' 
  AND token = 'CaboBdM16AXaUacQStnpr+X8mkUZ9pNtHx2alIhQJMM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}