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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '362e45ac070d708f27240fd336002a9185e71d40dec6de4848616b9c7d3aea83' 
  AND token = 'vM0MaNvhBqNxvU3CK+X2Zu/6aaHUUWDDynN09A1Rz94=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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