Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'db7a44fa28b64d75beca4b567506e2174d06c1e8b1ffaa2d272d7036c53e4fb5' 
  AND token = 'YuSmd4nD0H+t85WAaO9FiMxDAwwGPp+CGTQ2FFCs958=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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