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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bfb32f8a89ad7a8cb2a8f2975e49adfe83a209f643148cffb8742ec1479bc4ec' 
  AND token = 'G8AsQZ3K6Lc9CFLJbVq4+0jX7Uj7pVE9Kd9b4cjHMfI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00095

JSON explain

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