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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f28c1b6ff4e90a2f496f7b8b8a3c92e27d8eaf527f7b43b849c818324543b121' 
  AND token = '814ASbMInyAZCSWWFvfHYgO8J0axlmykA5HrST/56cg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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