Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fad59d1310cd5654300d4c1ca223802ea64c3077ce1a9d00f07cab7a1bc2f306' 
  AND token = 'sxIsnR3GwEyucjoOju+z4vZLa4jr/Ux1Q7NAaGTzOe0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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