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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '28372676ad29a91f24230beb3eff318b7e1f9d26b0bd62c2613b9b24ea93c46d' 
  AND token = 'aywJQxoo0Uk8ltRtVxQ1EAAMwp1pHQTnxI0dqQs2wrM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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