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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8d38aa041b295757e9a106a038630c8b1c165fa9fb5bc12cc21eb8282e8f2cdf' 
  AND token = 'Cnw0Np46H7CcSeVUZApnY93/x47laL7wpfYYtvfcneA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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