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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b09475fe888d34c116973f5848544c69a6c34436b39a15f1ae89b328bd811255' 
  AND token = '5Y+WpxPcP+AbnxIkirtfZNFPZlZfCYgh6B33UcIDukA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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