SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'a4f480d506377dc1b5662a5f6f366dc25879a64c63ab947818449f6516a796dd' 
  AND token = 'VX7veHKQwG/8Ky+QE41Wzj0klyya8qhoJUEk3xpBQTg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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