Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '12dd81512687f520598883c21b2ca02d5f293767aa216a539862963b6c5e7bf4' 
  AND token = 'RIqc0ErDAtrf/NgQ+87zdbpsrSsMDg3+WFWuM+wbbD0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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