Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b949ef4e41e1cd634a9408ed91b6764b38af17533cdfce02f60a7f76b4ea46a9' 
  AND token = 'mC/tYDI984rmaqengOTkodm+V6ZJQgDZR/HcNf2DeIY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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