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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1f17b3163cf69a373c5ae99bcc57c71a6c130beb6629b57d7aa9e8ca6480f1c9' 
  AND token = 'NchCigQVQvXLMNfuc1I8RWtkN6NnQzCxCWjs3wR2h0w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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