SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b810ab84efe470936129e767e685bb5d82bb52279d3446dab4fe96f2372ad48c' 
  AND token = '4pVZdrn/ZILpaRahmwSwyuEp0+ilG24LXUvKaorgPNw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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