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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ee0391e92a8678801cb79c27577eaa389a8370d377380fec16844efad1a32178' 
  AND token = 'hYNry/VIry3Tepoh9e5UTg6M9YQy/CLIzhJmWreXHuU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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