Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bdec3a34d18315d9a91a3b0e24ebe42bff33840d5cd01b63c3555ae9f7ad82a6' 
  AND token = 'efSB8cBkCEO27FRX+l9ZgJIfvux2DjlHeZSNmKpUcp0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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