Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd3a8896f79ebb69385f9cde2fec0b8d87d301b864a481ee78a359f5bb61c8c2e' 
  AND token = '1BuCp6vXJEYWzrP1ddRCOtMH9swPCsgaacjU4cZyiZU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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