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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'b143ad053abc4a30947bcf29dc7500d7be02a94b4df169350ebc7ca5a69d41eb' 
  AND token = 'pyuT0QQL48ri4tQ4AVzhnRq8f3gMdJ6IslCpefcBTTg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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