SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'fc193005d35b98d4e056adc4ee9f1b5ab1942e42ab1694835828ca0a3a9205d3' 
  AND token = 'JUmIOp7bimqFyrnveQgm8/MkqJmHPBiGQdhlW5bZDQo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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