Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cf11ee231d0b448d449cb608eeb0a042c1edd106b4387b342b89f732f5dd6217' 
  AND token = '4UKLLwTM+iJHEIuXSWEUfOpuUAqA2AhvqF6TBC6+N9M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}