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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2e2434a344a54185adcf216c2f12475a3f04c465108c20613d7740871616f5f7' 
  AND token = '4/GEagMyuc2B0kt5/6Up97bSiCLgI3vi2J1F1bxbrMc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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