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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '97217196073ccffc09b3e217e8dba46f62610e6956aaa6e92006462dc7609d1b' 
  AND token = '1fwn4UEGn7aG05IS2OraD/7ew84Z99ph06L5nzjB4x4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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