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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2202b18c0a3c075ae89ea686a31d73319861231e57e4fbff99be1f63294222dd' 
  AND token = 'wAjTFE31cxM13+K3zqWLYSnHgVlBoBEMCsuwXCCASl8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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