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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '068261d7a3ad7dd91ef59e1e072edd1b815fc15a9d183dbd9340b2023d4c1aac' 
  AND token = '6t5VtKIHRF6nsGSCQG5Q4BRrH8+xtLsM7FnScWjbOzA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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