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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '63310ade3499539df6115c0f9918702ec0a7a43b2776760729a77fe6c6ad7d6a' 
  AND token = 'b7oIoO7iT9Ur+jNb130Y2hBirWdb3+8Gp+1ccfLuigU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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