Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '33d8c6a88d05afaef7bbaa861d1f0a00a16d861329fe564238d7a316c5a1d9a9' 
  AND token = 'DP6po8cTo9CtQdymXQJiWewm0sPozkF78ND3KrhlNis=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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