Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b7b9be63ac5bdad4f0d35432c15d12f1677407760df2bcef211efbb78cf48cff' 
  AND token = 'bW5dcKh3OC1Pm6c9+W17pCdwMp57qjGv7x9kz7bzXZM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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