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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '30bed256a56110a866ab4e4149f076ace1acb1fb3f3ace305cf39ae9427d5a8d' 
  AND token = 'nfHG46QrMKGDj/oahG/HhCTytHfIKrAlIXURCinRIf4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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