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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1e67d320f2ebef0fc264645ac9a7dabd9b4fed58ddff08c54d81dbc8faab005f' 
  AND token = 'dBB11OawsRFFRK8l2rpB9bnPVVaRTbgNZVa6aFoJvIs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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