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SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '06d8648ad55bccb9f26a40fad2b0bd3cf749d2f46815a004666fee471c9e57a5' 
  AND token = 'zsHUfn7e/e4pZ+RK9m/6hIVHLMMnWocr+cFh7Z6tmhA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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