Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '42fd79f0c0941d1cd5448b27b00bce674bb94cffd4d3c2073767e9cbd24a2b1a' 
  AND token = 'ho8ZIqIQ22aLb++6rvHRRo31AcCokDtL5KB9AynWYA0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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